Postgres problems on the CI server

Hi all,

ActiveRecord Postgres tests are failing on the CI server as follows:

1. ForeignKeyFixturesTest crashes the postgres process (literally, a segfault).
2. Subsequent tests fail because they cannot get a database connection
while Postgres is recovering from the crash.
3. Once pg_ctl restarts postgres processes, all remaining tests pass.

Google seems to think that Postgres 8 segfaulting on PPC Macs is not
unheard of... Few quick remedies I tried (restart, recompile, update
the client, recreate the database files etc) didn't work.

For the time being, I just commented out the section that runs
test_postgresql within the build script. If anyone is interested in
troubleshooting Postgres segfaults, post me please.